another div -> fastdiv, another 2% faster vorbis.

Originally committed as revision 5902 to svn://svn.ffmpeg.org/ffmpeg/trunk
19 years ago · 32e8763103
parent c198597864
commit 32e8763103
1 changed files with 3 additions and 1 deletions
--- a/libavcodec/vorbis.c
+++ b/libavcodec/vorbis.c
@ -1379,7 +1379,9 @@ static int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr, uint_fa

                        if (vqbook>=0) {
                            uint_fast16_t coffs;
-                            uint_fast16_t step=vr->partition_size/vc->codebooks[vqbook].dimensions;
+                            uint_fast8_t dim= vc->codebooks[vqbook].dimensions;
+                            uint_fast16_t step= dim==1 ? vr->partition_size
+                                              : FASTDIV(vr->partition_size, dim);
                            vorbis_codebook codebook= vc->codebooks[vqbook];

                            if (vr->type==0) {